Attachment plug receptacle



y 1932- A. MUELLERWEISS 1,861,223

ATTACHMENT PLUG RECEPTACLE Filed March 2, 1929 6 09M fifaaZ/egmazu: v

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Patented May 31, 1932 PATENT OFFICE ADOLPH MUELLERWEISS, OF SEBEWAING,MIGHIGAN ATTACHMENT PLUG RECEPTAGLE Application filed March 2,

This invention relates to receptacles, and more particularly toelectrical receptacles in which a pronged plug-cap is adapted to beinserted.

The prime object of the invention is to so shape and form the top of thereceptacle, so that it acts as a guide for guiding the plug blades intothe slots.

Another object is to provide a receptacle plug having a flat depressedsurface, the marginal edges of which are shouldered to the end that theplug can be quickly and easily connected, even in the dark.

A further object is to so design and shape the face of the receptacle,so that the prongs of any standard plug naturally move into alinementand register with the slots, which is simple and inexpensive tomanufacture, which facilitates the connection of the plug and which inno manner changes the operation thereof. I

With the above and other objects in view, the present invention consistsin the combination and arrangement of parts, hereinafter more fullydescribed, and illustrated in the accompanying drawings, andparticularly pointed out in the appended claims, it being understoodthat changes may be made in the form, size, proportion, and minordetails of construction, without departing from the spirit, orsacrificing any of the advantages of the invention.

In the drawings:

Fig. l is a top plan view of a receptacle having tandem blades orprongs.

Fig. 2 is a part sectional side view thereof, also showing a plug incombination therewith.

Fig. 3 is also a plan view of a receptacle having parallel blades orprongs.

Fig. 4 is a similar view of a receptacle of the combination type,designed to receive either tandem or parallel prongs.

Fig. 5 is a part sectional side view thereof.

Fig. 6 is a plan view of a receptacle such as used for pronged radiotubes.

Receptacles such as are on the market at the present time are formedwith a substan tially fiat upper surface having spaced apart prongreceiving openings therein, and which 1929. Serial No. 343,857.

are adapted to receive the prongs of a conven-' tional plug. In flushWall and floor sockets, electrical applia-nces'and radios, and in factin any place where receptacles of this design are used, it is quitedilficult to insert the 55 prongs, due to smooth upper surface of thereceptacle, and the fact that the receptacle is generally in a positionWhere a good View cannot be obtained, consequently the prongs of theplug mustbe slid and moved around 50 until they register in' the propermanner, this is generally very inconvenient, becausethe person doing theconnecting must bend to an awkward position, oftimes the light is verydim or it may be entirely dark, and this groping endeavoring to make theplug connecting is not conducive to the improvement of ones disposition,and I have therefore perfected a receptacle in which the aforesaiddisadvan tages are eliminated, and in which the prongs are naturallyguided into place.

Referring now'particularly to the drawings, the numeral 5 indicates areceptacle having a screw shell body portion 6 for se curing it in asocket, spaced apart openings 7 being provided in the face, and areadapted to receive the prongs 8 of a plug member 9 in the usual manner.

The top of the receptacle is formed with a flat depressed portion 10,terminating in a so sharply defined shoulder 11, certain edges of eachof the openings, remote from said flat depressed portion, being indirect vertical alinement with said shoulder with the exception of thereceptacle 12 which is designed for radio tubes, and which is formedwith a plurality of prongs which register with the openings 13.

In Figs. 4 and 5 of the drawings I have shown a combination receptaclewhich can be used with a plug having either tandem or parallel prongs,in this construction the cen trally disposed heart shaped raised surface14; projects beyond the prong openings, and n it will be clearly obviousthat by placing the prongs of a plug on the depressed surface, andmoving towards the center of the receptacle, that the plug willautomatically turn, (if necessary) and register with the opening in theface of the receptacle, as the shoulder follows the round outer edge ofthe plug, and thence leads to the openings, so that the prongs naturallyassume the proper position. With my improved construction the plug canbe quickly and readily inserted in the dark, or without looking at thereceptacle, as the prongs are naturally guided to proper position, andthere is no possibility of inserting one of the prongs in the wrongopening.

From the foregoing description it will be obvious that I have perfecteda very simple, inexpensive, and convenient receptacle.

What I claim is 1. In a separable attachment plug, guide meansincorporated in the top face of the base for directing prongs intoregister with separate openings therein, said guide means consisting offorming said top face of the base into two surfaces separated by anabrupt shoulder that extends directly across from one to another of saidopenings flush with a Wall of each.

2. In a separable attachment plug, guide means incorporated in the topface of the base for directing prongs into register with separateopenings therein, said guide means consisting of forming said top faceof the base into twosurfaces separated by an abrupt shoulder thatextends directly across from one to another of said openings flush witha Wall of each, said shoulder also extending beyond said openings inthemanner of an endless enclosure encompassing said openings.

3; Ina separable attachment plug, guide means incorporated in the'topface of the base for directing the prongs into register with separateopenings therein, said guide means consisting of forming said top faceof the baseinto two surfaces separated by an abrupt;

shoulder that extends from one to another of said openings flush With aWall of each, said shoulder also extending beyond said openings in themanner of an endless enclosure encompassing said openings.

In testimony whereof I hereunto affix my srgnature.

ADOLPH MUELLERWEISS.

